阅读说明：本技术 用于地下结构安全施工的施工装置及施工方法 (Construction device and construction method for safe construction of underground structure ) 是由 刘建 赵久彰 乐玥 王刚 黄继军 杨荣 于 2020-07-31 设计创作，主要内容包括：本发明公开了一种用于地下结构安全施工的施工装置及施工方法,所述施工装置包括基坑支护组件,所述基坑支护组件包括多块支护板,所述支护板包括多块围板及多块挡土板；所述围板为中空的板状结构；所述围板包括用于与基坑相接的外侧板及靠近基坑中心的内侧板,所述外侧板上开设有多个连通孔；所述内侧板上开设有的排水口；任意两相邻挡土板之间的间隙内均设置有注浆管,所述注浆孔的出口端朝向注浆管远离围板的一侧。所述施工方法基于所述施工装置。采用本方案提供的装置及方法,不仅可通过为基坑施工提供支护以利于施工安全,同时在完成基坑施工后,可部分或全部填补因为基坑施工对基坑边缘土层所造成的空洞,利于基坑周围地层的稳定性。(The invention discloses a construction device and a construction method for safe construction of an underground structure, wherein the construction device comprises a foundation pit supporting assembly, the foundation pit supporting assembly comprises a plurality of supporting plates, and each supporting plate comprises a plurality of enclosing plates and a plurality of retaining plates; the coaming is of a hollow plate-shaped structure; the coaming comprises an outer side plate connected with the foundation pit and an inner side plate close to the center of the foundation pit, and a plurality of communicating holes are formed in the outer side plate; a water outlet is formed in the inner side plate; and a grouting pipe is arranged in a gap between any two adjacent retaining plates, and the outlet end of the grouting hole faces to one side of the grouting pipe, which is far away from the surrounding plate. The construction method is based on the construction device. By adopting the device and the method provided by the scheme, the construction safety can be facilitated by providing support for foundation pit construction, and meanwhile, after the foundation pit construction is completed, the cavity caused by the foundation pit construction to the soil layer at the edge of the foundation pit can be partially or completely filled, so that the stability of the stratum around the foundation pit is facilitated.)

1. The construction device for the safe construction of the underground structure comprises a foundation pit supporting assembly, wherein the foundation pit supporting assembly comprises a plurality of supporting and protecting plates which are sequentially arranged along the circumferential direction of a foundation pit, and the construction device is characterized in that each supporting and protecting plate comprises a plurality of enclosing plates (1) and a plurality of retaining plates (21);

the retaining plates (21) are arranged at intervals along the circumferential direction of the foundation pit, a coaming (1) is arranged between any two adjacent retaining plates (21), and the outer side of each coaming (1) is extruded on the inner side of each corresponding retaining plate (21);

the coaming (1) is of a hollow plate-shaped structure;

the coaming (1) comprises an outer side plate connected with the foundation pit and an inner side plate close to the center of the foundation pit, wherein a plurality of communicating holes (15) penetrating through the inner side and the outer side of the outer side plate are formed in the outer side plate; the inner side plate is provided with a water outlet (13) which penetrates through the inner side and the outer side of the inner side plate;

all be provided with slip casting pipe (10) of vertical setting in the clearance between arbitrary two adjacent fender soil board (21), be provided with a plurality of slip casting holes (101) of arranging along slip casting pipe (10) axis direction on slip casting pipe (10), the exit end of slip casting hole (101) is kept away from one side of bounding wall (1) towards slip casting pipe (10).

2. A construction equipment for underground structure safety construction according to claim 1, wherein the coaming (1) and the earth-retaining plate (21) are enclosed into a cylindrical structure, and a vertically arranged sealing strip is arranged between each coaming (1) and the earth-retaining plate (21) contacted with the coaming.

3. The construction device for the safe construction of the underground structure according to claim 1, wherein the inside of the bottom of each surrounding plate (1) is provided with a water tank (12) fixed on the inside plate, and the outlet end of the water outlet (13) is positioned in the water tank (12);

the fluid conducting capacity of the drain holes (13) on each enclosing plate (1) is adjustable.

4. A working apparatus for safety work of an underground structure according to claim 3, wherein the number of the drain ports (13) on each surrounding plate (1) is plural, and the blocking state of part or all of the drain ports (13) on each surrounding plate (1) is adjustable.

5. The construction equipment for the safety construction of the underground structure according to claim 1, further comprising a filter screen (16) disposed in the hollow space of each surrounding plate (1), wherein the filter screen (16) divides the hollow space into an outer cavity and an inner cavity in the plate thickness direction of the surrounding plate (1), the outer cavity is a cavity between the filter screen (16) and the outer plate, and the inner cavity is a cavity between the filter screen (16) and the inner plate;

the mud discharging port (7) is connected to the bottom side of the enclosing plate (1), and the inlet end of the mud discharging port is connected with the inner cavity;

the water injection port (9) is connected to the enclosing plate (1), and the outlet end of the water injection port is connected with the inner side cavity;

the sludge discharge port (7) and the water injection port (9) are provided with cut-off devices for controlling the on-off states of the sludge discharge port and the water injection port respectively.

6. A construction device for underground structure safety construction according to claim 5, characterized in that each drainage opening (13) is fitted with a plug (14), further comprising a communicating pipe (8) connected to the surrounding plate (1) and having an outlet end communicating with the hollow space.

7. Construction equipment for the safe construction of underground structures according to claim 5, characterized in that the connection of the filtering net (16) with the coaming (1) is realized by: the other four surfaces of the coaming (1) are respectively an upper end surface, a lower end surface, a left end surface and a right end surface, and any one of the other four surfaces is connected to the coaming (1) through a bolt;

two chutes which are opposite to each other are arranged on the wall surface of the hollow space of the enclosing plate (1), and the filter screen (16) is clamped in the hollow space through the chutes;

the starting end of the sliding groove is opposite to the surface of the enclosing plate (1) connected with the bolt.

8. A construction apparatus for underground structure safety construction according to claim 5, further comprising a support plate (17) disposed inside the inner cavity, the filter screen (16) being supported on the support plate (17) as a surface of the inner cavity boundary.

9. The construction device for the safe construction of the underground structure according to claim 1, further comprising a support frame for supporting the surrounding plates (1), wherein the support frame comprises vertical rods (3) and a plurality of cross rods (2) arranged along the axial direction of the vertical rods (3), the cross rods (2) are used as support members between the vertical rods (3) and the inner sides of the surrounding plates (1), and the length of the cross rods (2) is adjustable; the cross rod (2) comprises a threaded cylinder (4) and a threaded rod (5) which are connected in series, the threaded cylinder (4) is in threaded connection with the threaded rod (5) and is coaxial with the threaded rod, the threaded cylinder (4) is connected with the upright rod (3), and a base plate (6) is arranged between the end part of the threaded rod (5) and the inner side of the enclosing plate (1);

the pad (6) comprises: the steel plate comprises a first plate body which is a steel plate, a second plate body which is a plastic plate or a graphite plate and a third plate body which is a steel plate, wherein the first plate body is fixedly connected with a threaded rod (5), the second plate body is clamped between the first plate body and the third plate body, and the outer side of the bottom plate body is in contact with the inner side of a surrounding plate (1);

the device is characterized by further comprising sleeves (20) which are sleeved on the vertical rods (3) and can slide along the axial lines of the vertical rods (3), two cross rods (2) are fixed on each sleeve (20), and the cross rods (2) on each sleeve (20) are in line symmetry relative to the axial lines of the sleeves;

the number of the coamings (1) is even, the coamings (1) are uniformly distributed in an annular way relative to the axis of the upright stanchion (3), and the end part of the cross rod (2) on each sleeve (20) is acted on the coamings (1) on the corresponding side of the upright stanchion (3);

the locking device is used for realizing the position locking of the sleeve on the axis of the cross rod (2).

10. Construction method for the safe construction of underground structures, characterized in that it is based on the device according to any one of claims 1 to 9, and it is achieved by the following steps:

s1, completing the installation of the coaming (1), the retaining plate (21) and the grouting pipe (10) on the edge of the foundation pit, and providing support for the wall surface of the foundation pit by using the device;

s2, in the foundation pit construction process, the foundation pit dewatering is realized by using the communicating holes (15) and the drainage openings (13) on the enclosing plates (1);

and S3, after the foundation pit construction is completed, grouting material is injected to the outer side of the grouting pipe (10) by using the grouting pipe (10), and in the grouting material curing process, the enclosing plate (1) is used as a template for supporting the grouting pipe (10).

Technical Field

The invention relates to the technical field of underground engineering construction, in particular to a construction device and a construction method for safe construction of an underground structure.

Background

The foundation pit generally refers to a soil pit excavated at the design position of a building foundation according to the elevation of the building foundation and the plane size of the foundation. To the foundation ditch construction, the excavation supporting device just is the safety protection structure as temporary structure for prevent to appear the phenomenon of collapsing in the excavation construction process. Meanwhile, in the excavation and construction processes of the foundation pit, the precipitation problem of the foundation pit needs to be considered.

The sandy gravel geology generally has loose stratums and rich water, and particularly needs to pay attention to the influence of stratum rainfall on the surrounding environment in the foundation pit construction of a building with the sandy gravel stratum close to the water-rich sand gravel stratum. Therefore, in the existing construction, a series of problems of large construction difficulty, large influence on the surrounding environment and the like exist in the construction process of a sand-gravel stratum deep foundation pit (foundation pit engineering with excavation depth of more than 5 meters (including 5 meters) or depth of less than 5 meters, but geological conditions, surrounding environment and underground pipelines are particularly complex).

Disclosure of Invention

Aiming at the technical problems that development of water-rich sand-egg stratum deep foundation pit dewatering optimization and risk control research has great significance for underground building construction, the invention provides a construction device and a construction method for underground structure safety construction.

The construction device for the safe construction of the underground structure comprises a foundation pit supporting assembly, wherein the foundation pit supporting assembly comprises a plurality of supporting plates which are sequentially arranged along the circumferential direction of a foundation pit, and each supporting plate comprises a plurality of coamings and a plurality of retaining plates;

the retaining plates are arranged at intervals along the circumferential direction of the foundation pit, a coaming is arranged between any two adjacent retaining plates, and the outer side of each coaming is extruded on the inner side of each corresponding retaining plate;

the coaming is of a hollow plate-shaped structure;

the coaming comprises an outer side plate connected with the foundation pit and an inner side plate close to the center of the foundation pit, wherein a plurality of communicating holes penetrating through the inner side and the outer side of the outer side plate are formed in the outer side plate; the inner side plate is provided with a water outlet which penetrates through the inner side and the outer side of the inner side plate;

the vertical grouting pipes are arranged in the gaps between any two adjacent retaining plates, a plurality of grouting holes are formed in each grouting pipe and are arranged along the axial direction of each grouting pipe, and the outlet ends of the grouting holes face the sides, far away from the surrounding plates, of the grouting pipes.

The scheme aims at solving the problems that the construction difficulty is large and the peripheral environment is easily influenced in the process of constructing the foundation pit in the sand-gravel stratum, particularly in the process of constructing the deep foundation pit, and provides the scheme by using the characteristics that the sand-gravel stratum is usually accompanied by water-rich characteristics and is extremely easy to collapse. When this scheme is specifically used, reach for several down the structure construction provide safety protection with strutting, provide foundation ditch precipitation condition and promote the foundation ditch construction back, the purpose of bottom stability around the foundation ditch according to following operation method:

s1, completing the installation of the coamings, the retaining plates and the grouting pipes on the edge of the foundation pit, and utilizing the device to provide support for the wall surface of the foundation pit.

S2, in the foundation pit work progress, utilize intercommunicating pore and outlet on the bounding wall, realize the foundation pit dewatering, in this step, to if in the underground structure construction, the problem of sand ovum geology be not convenient for set up well point dewatering, adopt and set up intercommunicating pore and outlet on the bounding wall as retaining wall component, realize the foundation pit dewatering, in the concrete structural design, set up the bounding wall into hollow structure, aim at considering: the intercommunicating pore is the inlet opening on the bounding wall in fact, the outlet is the apopore on the bounding wall in fact, and the design of going up the inlet opening should be considered in fact as setting up as much as possible and coverage area as big as possible, like this, can solve the water that comes from the stratum to a certain extent and concentrate the bounding wall by the local of bounding wall and introduce, cause the stratum part because the water erodees and form the problem of large tracts of land hole, get together in the inside of bounding wall after the water gets into the bounding wall, then discharge by the outlet, can reach and be convenient for collect and extract the play water that comes from the bounding wall, so when concrete transportation, set up to the intercommunicating pore cover the whole.

S3, after foundation pit construction is completed, grouting material is injected into the grouting pipe from the outside of the grouting pipe by the grouting pipe, and in the grouting material solidification process, the enclosing plates are used as templates for supporting the grouting pipe.

This scheme is when concrete when using, and the bounding wall can adopt the concatenation of polylith panel to form, like according to interior design, to the scheme that does not adopt the filter screen, can adopt 6 dull and stereotyped welding, to including the filter screen and need carry out the scheme of maintaining to the filter screen, set up to one of them dull and stereotyped rather than the dull and stereotyped bolted connection that meets etc..

The further technical scheme is as follows:

for utilizing this device to form the whole protection to the foundation ditch wall, set up as: the coamings and the retaining plates are enclosed into a cylindrical structure, and sealing strips which are vertically arranged are arranged between each coamings and the retaining plates which are contacted with the coamings. This scheme of adoption, utilization the sealing strip for the circulation path of foundation pit precipitation is limited only to pass the bounding wall, like this, on the flow of well point precipitation and control well point precipitation, the technical staff of being convenient for obtains the equilibrium point: the requirements of precipitation can be met, and the safety of the surrounding bottom layer can be considered, for example, the water outlet flow of the water outlet is controlled, so that the purposes are achieved.

In order to realize that the bounding wall goes out that the water is collected and to realize above balance point grasp, set up to: the inner side of the bottom of each enclosing plate is provided with a water tank fixed on the inner side plate, and the outlet end of the water outlet is positioned in the water tank;

the fluid conducting capacity of the water discharging openings on the enclosing plates is adjustable.

As a concrete scheme that the fluid conducting capacity of the water outlet is adjustable, the water outlet is provided with the following components: the number of the water outlets on each enclosing plate is multiple, and the blocking state of part or all of the water outlets on each enclosing plate can be adjusted. According to the scheme, the water outlet flow of the enclosing plate is adjusted through the water outlets, and a mode of blocking part of the water outlets is adopted as a specific adjusting mode. When the drainage device is used specifically, if the drainage of the foundation pit does not meet the safety requirement, the drainage device can adopt a state of completely blocking the upper drainage hole.

As above, this scheme is when concrete implementation, and for realizing that the bounding wall passes through many gradients of outlet discharge flow adjustable, preferred setting is as many as possible to outlet quantity, simultaneously, to the water guide ability at foundation ditch edge on considering the bounding wall outer panel, avoids concentrating the water guide and leads to the too big influence that enlarges foundation ditch excavation and cause the bottom of foundation ditch local hole, and the preferred mode that adopts intercommunicating pore evenly distributed on the whole face of outer panel sets up as an outlet anti-blocking scheme: the filter screen is arranged in the hollow space of each enclosing plate, the hollow space is divided into an outer side cavity and an inner side cavity by the filter screen in the plate thickness direction of the enclosing plates, the outer side cavity is a cavity between the filter screen and the outer side plate, and the inner side cavity is a cavity between the filter screen and the inner side plate;

the mud discharging port is connected to the bottom side of the enclosing plate, and the inlet end of the mud discharging port is connected with the inner side cavity;

the water injection port is connected to the enclosing plate, and the outlet end of the water injection port is connected with the inner side cavity;

and the sludge discharge port and the water injection port are respectively provided with a cut-off device for controlling the on-off state of each. In the scheme, the filter screen is used as a filter component between the communication hole and the water outlet, so that the water outlet is prevented from being blocked due to the fact that sand, mud and the like are introduced into the enclosing plate in a short time due to more communication holes; set up to include mud discharging port, water filling port aim at realizing: periodically or under the condition of need, injecting cleaning water through the water injection port to clean the outer cavity, and then discharging the cleaning water through the sludge discharge port; the device is characterized by also comprising a cutting device, aiming at realizing the cutting of the sludge outlet under the unnecessary condition, and the fluid is only enriched in the water tank and pumped out by a common pump body; the positions of the sludge discharge port and the water injection port are limited, and the whole filtering surface of the filter screen is covered by the cleaning water as much as possible; the setting of cutting the device more than not only aims at realizing above current-limiting purpose, also can regard as the space of keeping in of entering bounding wall sand, mud through the outside cavity simultaneously, if utilize sand, the mud of certain time interval outside cavity accumulation, judge the influence of precipitation flow this moment to the stratum security.

As a technical scheme for solving the problem of the blockage of the communication hole by introducing pressure gas into the hollow space of the enclosing plate under the condition of closing each water outlet and shutting off the cut-off device, the device is provided with the following components: each water outlet is matched with a plug, and the water outlet also comprises a communicating pipe which is connected to the enclosing plate, and the outlet end of the communicating pipe is communicated with the hollow space.

As a technical scheme convenient for cleaning and maintenance in the installation and use processes of the filter screen: the connection of the filter screen and the coaming is realized through the following modes: the connection of the filter screen and the coaming is realized through the following modes: the other four surfaces of the coaming are respectively an upper end surface, a lower end surface, a left end surface and a right end surface, and any one of the other four surfaces is connected to the coaming through a bolt;

two chutes which are in a dead-against relation are arranged on the wall surface of the hollow space of the enclosing plate, and the filter screen is clamped in the hollow space through the chutes;

the starting end of the sliding groove is opposite to the surface of the bolt connected to the enclosing plate. This scheme of adoption, after the face of detaching bolted connection on the bounding wall, can accomplish the dismantlement or the installation of filter screen through taking out, inserting the operation.

The filter screen is used as the surface of the boundary of the inner cavity to be supported on the support plate.

As a technical scheme convenient for finishing the bounding wall at the edge of the foundation pit, the method is characterized in that: the supporting frame comprises an upright rod and a plurality of cross rods arranged along the axial direction of the upright rod, the cross rods are used as supporting pieces between the upright rod and the inner sides of the enclosing plates, and the length of each cross rod is adjustable; as a specific scheme that the length of the cross rod is adjustable and is convenient to adjust, the cross rod comprises a threaded cylinder and a threaded rod which are connected in series, the threaded cylinder is in threaded connection and coaxial with the threaded rod, the threaded cylinder is connected with a vertical rod, and a base plate is arranged between the end part of the threaded rod and the inner side of the enclosing plate;

the backing plate includes: the anti-friction plate is characterized by comprising a first plate body which is a steel plate, a second plate body which is a plastic plate or a graphite plate and a third plate body which is a steel plate, wherein the first plate body is fixedly connected with a threaded rod, the second plate body is clamped between the first plate body and the third plate body, and the outer side of the bottom plate body is contacted with the inner side of a surrounding plate;

as one kind through balanced pole setting both sides atress, be convenient for stabilize the position of pole setting in the space for the support frame is split type structure, and the support frame position of being convenient for shifts and saves, makes can be according to the technical scheme of the convenient adjustment horizontal pole position of concrete support needs, sets up to: the device also comprises sleeves which are sleeved on the vertical rods and can slide along the axial lines of the vertical rods, two cross rods are fixed on each sleeve, and the cross rods on each sleeve are in line symmetry relative to the axial lines of the sleeves;

the number of the coamings is even, the coamings are uniformly distributed in an annular manner relative to the axis of the upright stanchion, and the end part of the cross bar on each sleeve is acted on the coamings on the corresponding side of the upright stanchion;

and the locking device is used for realizing the position locking of the sleeve on the axis of the cross bar. In the above concrete structural design, set up to: the quantity that the bounding wall is even number and annular equipartition in the circumferential direction of pole setting, to the atress of pole setting, because the thrust direction that comes from different side horizontal poles is opposite, so the atress of pole setting can effectively be optimized to the assembly body that comprises sleeve, horizontal pole, improves the stability of support frame.

Set up to the sleeve and can slide along the axis of pole setting, set up detachable rings if the cooperation is in the upper end of pole setting, to the setting of support frame and the assembly of this device, conveniently through following operation, under the circumstances of economic rationality, easily operation, obtain safe and reliable's construction scheme:

d1, completing the sleeving of all sleeves on the vertical rod, wherein the sleeves are stacked at the bottom of the vertical rod;

the mounting of the coamings on the side surfaces of the support frame is completed, and the coamings are attached to the inner side surfaces of the soil retaining plates;

completing the installation of the lifting ring on the top of the upright stanchion;

d2, adjusting the length of the cross bar at the two sides of the sleeve at the lowest part to ensure that the two ends of the cross bar form a supporting relation with the corresponding side wall plate, and restraining the position of the vertical bar in the space and maintaining the strength state of the vertical bar by utilizing the supporting relation;

d3, sequentially hoisting the cross rods on the sleeves on the upper side of the lowermost sleeve by using hoisting tools hung on the hoisting rings, so that the corresponding sleeves move to the required vertical rod axis positions along with the cross rods on the corresponding sleeves;

the specific hoisting is as follows: the sleeves on the uppermost layer are firstly lifted and are fixed on the vertical rods through the corresponding locking devices after the axial line positions are determined and the transverse rods are adjusted in length to restrain the corresponding side coamings, and then the sleeves are sequentially adjusted in position on the vertical rods and adjusted in length from top to bottom to restrain the coamings and fix the position on the vertical rods in the arrangement sequence of the sleeves.

The lifting rings are detachable, so that the vertical rods can be erected at the installation positions in a polished rod mode, then the sleeves are sleeved by the upper ends of the vertical rods, and then the lifting rings are installed to provide lifting points located at the top ends of the vertical rods for the sleeves.

In concrete structure is injectd and the mode of operation, utilize the horizontal pole on the sleeve of below, can realize utilizing the bounding wall, for the support state formation of pole setting prevents down the restraint, like this, when carrying out follow-up sleeve and lifting, can make the pole setting be in the state of relative stability, until accomplishing all sleeve position adjustments, if utilize chain block, electric block's mode to accomplish including sleeve and horizontal pole assembly hoist, realize preventing down the restraint of pole setting and accomplish follow-up hoist and mount and all have convenient operation, characteristics that economic nature is good. Aiming at the fixed position of the sleeve, the number of the bolt holes corresponding to the number of the sleeves can be arranged in the axial direction of the upright rod, and the bolt holes corresponding to the positions are selected according to the installation requirement of the specific sleeve, so that the sleeve and the upright rod form a pin connection relation to achieve the fixing purpose.

The scheme also provides a specific construction method, which is based on the device in any one of the above aspects and is realized by the following steps:

s1, completing the installation of the coamings, the retaining plates and the grouting pipes on the edge of the foundation pit, and providing support for the wall surface of the foundation pit by using the device;

s2, in the process of foundation pit construction, through holes and water outlets in the enclosing plates, foundation pit precipitation is achieved;

and S3, after the foundation pit construction is completed, injecting grouting material to the outer side of the grouting pipe by using the grouting pipe, and in the grouting material curing process, using the enclosing plate as a template for supporting the grouting pipe.

When concrete application, it all is provided with many slip casting pipes to prefer to set up to each between keeping off the native board, and to same slip casting area, many slip casting pipes can reduce the internal diameter of single slip casting pipe to promote the compressive capacity of slip casting pipe, in order to obtain better slip casting effect, simultaneously, to the purpose that utilizes the bounding wall to realize precipitation, many slip casting pipes also cover as far as possible be used for realizing the foundation ditch wall drainage area of precipitation.

Further, the grouting pipe between the retaining plates forms a grouting area, and in order to facilitate structural stability of the grouting area, it is preferable that a reinforcing mesh as a framework of grouting reinforcement is provided in each grouting area, for example, a concrete retaining wall including the framework of reinforcement is finally formed by grouting.

The invention has the following beneficial effects:

the scheme aims at solving the problems that the construction difficulty is large and the peripheral environment is easily influenced in the process of constructing the foundation pit in the sand-gravel stratum, particularly in the process of constructing the deep foundation pit, and provides the scheme by using the characteristics that the sand-gravel stratum is usually accompanied by water-rich characteristics and is extremely easy to collapse. When this scheme is specifically used, reach for several down the structure construction provide safety protection with strutting, provide foundation ditch precipitation condition and promote the foundation ditch construction back, the purpose of bottom stability around the foundation ditch according to following operation method:

s1, completing the installation of the coamings, the retaining plates and the grouting pipes on the edge of the foundation pit, and utilizing the device to provide support for the wall surface of the foundation pit.

S2, in the foundation pit work progress, utilize intercommunicating pore and outlet on the bounding wall, realize the foundation pit dewatering, in this step, to if in the underground structure construction, the problem of sand ovum geology be not convenient for set up well point dewatering, adopt and set up intercommunicating pore and outlet on the bounding wall as retaining wall component, realize the foundation pit dewatering, in the concrete structural design, set up the bounding wall into hollow structure, aim at considering: the intercommunicating pore is the inlet opening on the bounding wall in fact, the outlet is the apopore on the bounding wall in fact, and the design of going up the inlet opening should be considered in fact as setting up as much as possible and coverage area as big as possible, like this, can solve the water that comes from the stratum to a certain extent and concentrate the bounding wall by the local of bounding wall and introduce, cause the stratum part because the water erodees and form the problem of large tracts of land hole, get together in the inside of bounding wall after the water gets into the bounding wall, then discharge by the outlet, can reach and be convenient for collect and extract the play water that comes from the bounding wall, so when concrete transportation, set up to the intercommunicating pore cover the whole.

S3, after foundation pit construction is completed, grouting material is injected into the grouting pipe from the outside of the grouting pipe by the grouting pipe, and in the grouting material solidification process, the enclosing plates are used as templates for supporting the grouting pipe.

Drawings

Fig. 1 is a front view and a partial structural schematic view of an embodiment of a construction apparatus for underground structure safety construction according to the present invention, which is used for reflecting a matching relationship between a support frame and a surrounding plate;

FIG. 2 is a partial schematic view of one embodiment of the construction apparatus for the safe construction of an underground structure according to the present invention, reflecting the structural composition of the surrounding plate portion;

FIG. 3 is a top view of an embodiment of the construction apparatus for the safe construction of underground structures according to the present invention;

fig. 4 is a schematic structural view of a grout pipe in an embodiment of the construction apparatus for the safe construction of an underground structure according to the present invention.

The reference numbers in the figures are in order: 1. the concrete pile comprises a coaming, 2, a cross rod, 3, a vertical rod, 4, a threaded cylinder, 5, a threaded rod, 6, a backing plate, 7, a mud discharge port, 8, a communicating pipe, 9, a water injection port, 10, a grouting pipe, 101, a grouting hole, 11, a reinforcing mesh, 12, a water tank, 13, a water discharge port, 14, a plug, 15, a communication hole, 16, a filter screen, 17, a support plate, 18, a hanging ring, 19, a bolt hole, 20, a sleeve, 21 and a soil retaining plate.

Detailed Description

The present invention will be described in further detail with reference to examples, but the structure of the present invention is not limited to the following examples.